Make tests pass

tests/compile-fail/empty_enum.rs

@@ -1,6 +1,7 @@
 #![feature(plugin)]
 #![plugin(clippy)]
 
+#![allow(dead_code)]
 #![deny(empty_enum)]
 
 enum Empty {} //~ ERROR enum with no variants

tests/compile-fail/enum_glob_use.rs

@@ -5,7 +5,9 @@
 
 use std::cmp::Ordering::*; //~ ERROR: don't use glob imports for enum variants
 
-enum Enum {}
+enum Enum {
+    _Foo,
+}
 
 use self::Enum::*; //~ ERROR: don't use glob imports for enum variants